中国组织工程研究 ›› 2017, Vol. 21 ›› Issue (22): 3519-3524.doi: 10.3969/j.issn.2095-4344.2017.22.013

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

紫外线对老化钛表面理化性能及生物活性的再激活作用

卢海宾1,万  蕾2,张雪洋1,容明灯1,周  磊2
  

  1. 1南方医科大学口腔医院(广东省口腔医院)牙周种植科,广东省广州市  510280;2南方医科大学口腔医院(广东省口腔医院),广东省广州市  510280
  • 收稿日期:2017-06-21 出版日期:2017-08-08 发布日期:2017-09-01
  • 通讯作者: 卢海宾,南方医科大学口腔医院(广东省口腔医院)牙周种植科,广东省广州市 510280
  • 作者简介:卢海宾,男,1985年生,广东省阳春市人,博士,主治医师,主要从事口腔种植体表面处理及骨代用品的研究,以及牙列缺失的种植修复研究。
  • 基金资助:

    国家自然科学基金(81600900);广东省自然科学基金(2014A030310146)

Effect of ultraviolet rays on the re-activation of the physicochemical properties and bioactivity of aging titanium surface

Lu Hai-bin1, Wan Lei2, Zhang Xue-yang1, Rong Ming-deng1, Zhou Lei2 
  

  1. 1Department of Periodontics and Implantology, Stomatological Hospital, Southern Medical University, Guangzhou 510280, Guangdong Province, China; 2Stomatological Hospital, Southern Medical University, Guangzhou 510280, Guangdong Province, China
  • Received:2017-06-21 Online:2017-08-08 Published:2017-09-01
  • Contact: Lu Hai-bin, Department of Periodontics and Implantology, Stomatological Hospital, Southern Medical University, Guangzhou 510280, Guangdong Province, China
  • About author:Lu Hai-bin, M.D., Attending physician, Department of Periodontics and Implantology, Stomatological Hospital, Southern Medical University, Guangzhou 510280, Guangdong Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81600900; the Natural Science Foundation of Guangdong Province, No. 2014A030310146

摘要:

文章快速阅读

 

文题释义:
生物活性:是指生物材料与活体骨产生化学键合的能力,是衡量生物材料的一个重要指标。具有生物活性的钛表面,能够在生理环境诱导下,表面形成羟基磷灰石层,与骨组织实现直接的化学键结合,显著加强钛-骨的结合能力,并且能够加速骨愈合的速度。
防止钛片老化的手段:第一种是通过改变钛种植体的储存方式,如可采用液体保存的方式来避免碳氢化合物的影响,并且还可以在液体中添加不同的离子成分,如钙、磷等,使之有利保存钛表面的生物活性,这已得到了相关学者的研究证实;第二种方法是通过技术手段,清除老化钛表面的污染物,并且增加其表面自由能,对其表面理化性能及生物活性进行再激活,恢复其原有的表面性能。
 
背景:随着储存时间的延长,钛种植体会出现老化现象,表面理化性能及生物活性会出现不同程度的下降,影响最终的种植体-骨结合效能,如何迅速有效的恢复钛表面的理化性能及生物活性值得深入研究。
目的:探讨紫外线对老化钛表面理化性能及生物活性的再激活作用。
方法:将经过喷砂酸蚀处理的钛片随机分为3组,A组为喷砂酸蚀处理后的新鲜钛片,B组为常温常压保存4周,C组为常温常压保存4周后紫外线照射15 min,采用表面轮廓测量仪、X射线光电子能谱分析仪、水接触角分析仪检测钛表面的粗糙度、元素构成及表面能。将MG63成骨细胞分别接种于3组钛片表面,接种30 min、1 h、2 h、4 h,以Hoechst33342荧光染色检测细胞黏附能力;接种1,3 d,采用MTS法检测细胞增殖。
结果与结论:①3组钛表面的表面粗糙度无明显差异;②A、C组钛片表面C元素含量低于B组(P < 0.05),Ti、O、N元素含量显著高于B组(P < 0.05),A、C组钛片表面各种元素构成无明显差异;③A、C组钛片表面静态水接触角均为0°,B组钛片表面静态水接触角为115°;④接种30 min、1 h、2 h、4 h,A、C组钛片表面的细胞黏附数量高于B组(P < 0.05),A、C组钛片表面的细胞黏附数量无明显差异;⑤接种1,  3 d,A、C组钛片表面的细胞增殖能力高于B组(P < 0.05),A、C组钛片表面的细胞增殖能力无明显差异;⑥结果表明,紫外线可激活老化钛表面的理化性能及生物活性,显著减少碳氢化合物的污染,恢复钛表面的高表面能,有利于细胞的黏附和增殖。

关键词: 生物材料, 材料相容性, 钛表面, 碳氢化合物, 紫外线, 理化性能, 再激活, 国家自然科学基金

Abstract:

BACKGROUND: The physicochemical properties and bioactivity of titanium surface will degrade with time because of the aging phenomenon, affecting the efficiency of implant-bone osseointegration. Therefore, the re-activation of the implant surface physicochencical properties and bioactivity is important.
OBJECTIVE: To investigate the re-activation effect of ultraviolet rays on aging titanium surface.
METHODS: Sand-blasted and acid-etched titanium discs were divided into three groups randomly: Group A was new titanium surface, Group B was stored in a sealed container for 4 weeks, Group C was treated with ultraviolet rays for 15 minutes after stored in the sealed container for 4 weeks. The surface roughness, elemental composition and surface energy of the titanium surface were examined by optical profilometer, X-ray photoelectron spectroscopy and contact angle measuring device, respectively. The bioactivity of the titanium surface was examined by cell culture experiments. MG63 osteoblast-like cells were cultured on the different titanium surfaces. After 30 minutes, 1, 2, 4 hours of incubation, the cells were strained with Hoechst33342 fluorescence, and initial attachment of cells was evaluated by measuring the amount of cells attached to the titanium surface. The proliferation of cells was quantified in terms of cell density at 1 and 3 culture days using tetrazolium salt (MTS)-based colorimetry.
RESULTS AND CONCLUSION: There was no obvious difference in the surface roughness of the three groups, and ultraviolet treatment did not change the surface morphology of titanium surface. X-ray photoelectron spectroscopy showed that the C element content of group A and group C was lower than that of group B (P < 0.05), and the content of Ti, O, N elements was significantly higher than that of group B (P < 0.05). No difference in the surface element composition between group A and group C was found. Both of the surface contact angles of group A and group C were 0o, but in group B, the value was 115°. The number of initially attached cells of group A and group C was significantly higher than that of group B after incubated 30 minutes, 1, 2 and 4 hours (P < 0.05), and no difference between group A and group C was found. The proliferation of cells of group A and group C was significantly higher than that of group B after incubated 1 and 3 days (P < 0.05), but no difference between group A and group C was found. In conclusion, ultraviolet rays show good effects on the re-activation of the aging titanium surface, which can reduce hydrocarbon contamination and recover the high surface energy to increase cell adhesion and proliferation.

Key words: Dental Implants, Titanium, Ultraviolet Rays, Tissue Engineering

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